What is the general practice of grounding the sheath of control cables especially in HV substation/ switch yard. Do you ground the sheath or screen of the cable only at one end or at both the sends of the control cable?
In HV substations, control cable sheaths are typically grounded at one end, known as single-point grounding. This minimizes circulating currents and provides a reference point for the control system. Double-point grounding may be used in specific cases, but adherence to manufacturer recommendations and system design considerations is crucial.